Automatic piston-ring-grinding machine



June 15 192s. 1,588,739

c. E. JOHNSON AUTOMATIC PISTON RING GRINDP F MACHINE Filed Jan. 9. 1922'7 Sheets-Sheet 1 GharlesiQMhmmg flfjorneg J1me N5 E. JOiiNSCbNAUTOMATIC PISTON RING. GRINDING MACHINE 1 Filed. Jan. 9 1922 vSheetsSheet 2 'Inuenior I GhartesEJohnsou Worm June 15 ,1926. I1,588,739

.6. E. JOHNSON AUTOMATIC PISTON RING GRINDENG MACHINE Filed Jan. 9. 19227 Sheets-Sheet S 1W Y 14 s w w 5 g i" "i Q43 12 x 22 11 7 0 i: M 2,. 257 ////z// GlmrlesEJohnson (-lmarneg Julie 15 1 926.

AUTOMATIC PISTON RING GRINDING MACHINE Filed Jan, 9. 1922 '7 sheetssha'afl 4 irmm c GhdrlesBJohngon,

C. E. JOHNSON AUTOMATIC PISTON RING GRINDING MACHINE June 15 1926.

Filed Jan. 9. 1922 '7 Sheets-Sheet 5 Inuenfor GharlesBJohnson Fa) filmmyJune 15 1926.

C. E. JOHNSON AUTOMATIC PISTON RING GRINDING MACHINE Filed Jan. 9. 1922'7 Sheets-Sheet 6 Inuenfor (lhmglesfldohnson Worm June 15 1926.1,588,739.

- c. E. JOHNSON AUTOMATIC PISTON RING GRINDING MACHINE Filed Jan. 9,1922 v 7 s s 7 75 84- 719 v I 76 79 7? Q a I so 7 ,74 75 z I 57 7/ L V 132 6/ l 460* A 59 /1 fi l I v Q; ill. :li I A 5 t. M

mm; Char \caBJohnson 5 omeg UNITED STATES ATENT QFFICE.

CHARLES E. JOHNSON, 01 MUSKEGGN', MIGHIG.Q1.3I.

AUTOMATIC ZEIST'QN-RING dlBINDING 7 MA l'l flilil l'lill.

Appiiratnm fileddenuery 9. 1922. $eriel I-l'o. 52mins.

This invention relates to a machine for finish grinding iston ringcastings at the ends thereof, this being one of the opemtions necessaryto convert ring castings into finished piston rings. Prior to thefinishing grinding of the castings at their ends, it is usual to roughgrind the same to approximate form, with arremoval of the scaleandportions of the metal under the some, heavy -and relatively coarsegrinding Wheels being used such operation. This, however, can.

not bring the casting at its ends to finished form with the thickness ofthe ring brought to, proper limits of tolerance, and the final finishinggrinding operation is necessary. The present invention is concerned witha, machine in which the ring castings after the first rough grindingoperation may he placed, and the some finlsh ground, the machine beingdcsigncd for antonmticwvorking, that is, the machine is kept suppliedwith a (l uantity of the rough ground rings,

iich they are taken 'and ground and thereafter dropped or eject ed fromthe machine, finish ground at one end, being later finish ground at theother cndinolike machine, orthe same machine adjusted slightlydifi'erently. This invcn- 13101 has. for I its object and purpose, prinia'eiiy}, the provision of a machine by means of which. the"nhovedeiincd ends may he attained eiiicicntly and in av practical andsatisfactory innnncr, large quantity production being had, with anelimination of skilled labor for the finish grinding operation, winchhas been. r c-scary heretofore. Sub

sidiary to this pr; other objects end k with the attainment simplemanner and mechanism which is possible to get out effective in evercrosses lie-Vin to do with the provision of positive, practically imofxorr'ier, durable and Way. All of these, together with. many novelconstructions per" mitting and providing for the some, will appear fullyand in detail as understanding of the invention is had from thefollowing description, taken in connection with the occompanyingdrawings, in which,

Fig. 1 is a side elevation of a machine made in accordance with myinvention.

Fig. 2-is a front elevation of the machine, with parts in vertical closethe construction.

one at a time nitrite oi? y purpose, are several the ends noted 'in o-.grinding' Wheel section to better dis Fig. 3- is e tronsverse verticalsection I through theinaohine substantially. directly below the grindingwheel therefor and showing the vertical adjusting means therefor.

Fig. 4 is a. plan View of the B1110 ho per M and the individual ringselector-there mm for carrying the rings to the grinding wheel.

. F jg. 5 is s horizontal section on the'plane. of line 5- -5, of Fig.3.

1g. 6 is a view similar to Big. 5, the ring 5 hopper and ring selector'being rcmovedjto show the construction under the some.

Fig. 7 is a. horizontal section on theplane. of line 7--7, of F ig. 2.

Fig. 8 is a vertical longitudinal section 7 through the housing for themechanism for operating the ring selector, said mechanism being shown inelevation.

Fig. 9 is a fragmentary vertical section substantially on the plane ofline 9- 9, of 7 side elevationnl view. taken on the plane of line 1212,of

Fig. l

Like reference characters refer to like parts in the different figuresof the drawings.

The invention .isadopted to he applied to and need in. conjunction witha. Well knoyvn grinding machine, to inc known as no the Hc'ald grindingmachine, though the invention is not to be considered as restricted inuse to the one type of machine. Insuclr mochines, the supportingorbody'casting 1 v has ahead 2 silidololv'monnted'thereon for enrcciprocatory movements and at the front: end of the heads grindingwheel 3, partially;- covered by e hood 4 is rotatably mounted. Themachine is driven by a belt around pul leys 5. The mechanism for causingthe recipromtion of the head 2 and the-rotationxif the grinding wheel isnot ontlined, e.s .it'isi old and no part of the present invention.

At the front of the machine below the a relatively large verticallypositioned sleeve fi is located andv connected with the body 1 and asecond sleeve 7 mounted for tertice-l' adjustment. 'infl-the.

ca l; Era-n1 arms, the in rod 2? an :irvhripsd plate 31 is upper side inthe same plan:

upper end sleeve 7 stationary hem'l in chuck 10 is located, a ii at theupper and at i) niountsd in hearings, one ml at It at its lower anal issleeve 6. At its unpria hmsllc-(l piniiin'i in lkl nininn it? whichi'ixeil his short shaft mounted end of siaevs 5, its outer when l? bymeans of which be turned thrnugh the noteih anal Whi 1h may Latin meansi v' denotiiustn iiu' out" sum is S. i 1, ;is, 111m tail and a pninh:area-var, a as. LAP/(ll ailjustinum. =0, 7 at one side is formed with 19into which the- .Bllill pas 'ig thrnugh the sin- YiltlS ts preventrntatiY-Li meat at iii i inner sleeve. Tlw lower (:ml of the sleeve 7 isslased by 3 weather with the member Chimeric-(i. i0 iiizzshears. byshown. The hand has ,iteui iing annular Sll es Within 'heu turnedmitwarrliy wail $31 is poi-awn lITii v last integrally with ll 2 1- 5arm 26., (hi 313'; the

i s Fig;

i in the em i A. t

app.- and Z is: an :1 the sippvr i m" fhiz. chunk, .z'an l .r in vim'inm s curvurl 5 s Tin. plate $33, is

than ih' a l fur a purnnse lutvr apps-1 1 'mtatahiy mounted in a hearing4-0,

slams fin hon 3'. 22.116 intn Jihe housing at its upper and timing"GCi'lVfZi a dawnwardly extending formed an disk 33 which is verticalshaft 39 h1cli,to-

u intsfixed at ths lower end of a gather with a vertical slss *e 4.1 isyrally 'i ith the housing Thev sh? hrough the sleeve 4&1 antlabove 6 itsupper and having a head 42 wins. formed with 2 depending skirt 4:3 tover the upper and at the sleeve 41. Abnve the hszzcl a circular plate44 is placed and detachably secured thereto by set screws. A thin metanircular plate 45 is cannvctsd t0 anart ill in s i'ng'; s

" the, plaa 4.5, circular 0* J size receiving piston plats 4-5 isiocatsd so as y m i the plates 3 and, 32 and pper sills of the magneticchunk 10, as best qllOWl'l in Fig.

The disk is await-mated with a plurality of equaliy spacei'l radialslots 47. Parallel- .ing the shaft 39 is vertical shaft 48 nountad in ablaring 49 and in the shaft two triangular plates 5% and are secure oneOver the other between which, at the cmners ar-s slvsvss mount-(x1 (inrods 53 which. Wm ct the triangular plates at their earners s Fig. 7).This construction is located that on roiatian of shaft i8, the sleevesbrought to and enter the slots 47 in (lili 1 in practice there are sixof the sluts 4 an? :1 him number of openings in the it air piste whichasts as a "-0- lectnr plate :arry the ring castings lf'dlchlually in iin clinch i5. Shaft 48 at upper :ml is rguippr l u'itl': Worm wheel in.mesh with "which a warm fixnd on tha curl of a sh: i. 56 which entersthe housing Iii) at ans 7 l" i from said housing: in the rear uu'llmusing 57 (iii-2111i '"x i in the hwly the resipiuuztin haul umuntsi"'llui shaft 1' come i l .o musing 57 at t is" which is (anti 'taiiismanner 0x ippnisiis side clutch ats i4: and. at equally spaced aroundthe shaft between the disk and sleeve the tendency of which is to movethe sleeve so that its clutch teeth 61 shall engage with the clutchmember 59 to drive shaft 56 from shaft 58. y y

A guide block 67 is secured to thetinner side of the housing verticallyabove the disk and sleeve in which two rods 68 and 69 are slidablymounted for vertical movements, both being normally presseddownwardlyby' springs 70. Each at its upper end is formed with a head 71having conical upper sides below which is a groove 2 around each rod.Rod 68 at its lower end is pointed so as to readily enter the notch 65,and the lower end oi rod 69 is reduced in diameter and adapted to enterthe groove 63 in the sleeve 60, as shown in Figs. 8 and 11.

Above the guide block 67 a trip block 73 is secured, having twooppositely inclined lower sides 74-. A bar 7 5 is slidably mounted therods 68 and 69. The latch bars are normally impelled inwardly so as to.enter the grooves when brought thereto by springs 79 attached to member76 and bearing against the latch bars. Each bar on its inner side isformed with a saw-tooth projection 80',

adapted on the upward movement of the bar 75 with its attached member 76and latch bars, to ride against the inclined under sides '74 of the tripblock 73, thereby impelling the latch bars outwardly to disconnect thesame from the heads 71. A coiled spring under tension is connected atits upper end to the member 7 6, and at its lower end tothe guide block67, this spring 81. normally tending to draw the member 76 and bar 7 5into lower position as shown in Fig. 8, and thereby insure connection ofthe latch bars 77 with the heads 71.

The upper end of bar 7 5 has pivotal connection to one arm 83 of a bellcrank lever pivotally mounted at 84 to the side of the ody 1 of themachine, the other arm 85 of' the lever extending upwardly into the pathof movement of a trip member 86 adjustably mounted in a horizontal guide87 on the re ciprocuting head 2. On the rearward movement of the head,the arm 85 is struck by trip member 8d with the result that the bar 75and attached mechanism is elevated, the latch bars 77, in engagementwith the heads 71, as shown in Fig. 8, lifting both rods 68 and 69. The"elevation of the former frees the disk 64. and of the latterdisconnects the l e e d t e eof from the s eeve so that bar 96 and thethe clutch parts 61 and 59 are immediatel connected together and shaft56 rotated The continuation of the upward movement brings projections 80against the inclines 74, thereby disengaging the latch bars from theheads 71 and letting the rods and 69 tall, the lower end of the rod 68riding over the outer curved surface of disk 64 and the low er .end ofrod 69 entering the wider portion of the grooves 63 in sleeve 60. Theconnection of the clutch parts causes a turning of the sleeve 60 untilthe cam portion of the sleeve rides against the lower end of rod 69,whereupon the sleeve 69 is automati cally moved to disconnect its clutchpart 61 from the other clutchmember 59. As soon as this is accomplished,the notch 65 in disk'64 comes to position to receive the lower pointedend or red 68 which enters the'notch and stops the mechanismfroinoverrunning undeumomentum.

Accordingly, it is evident that with each reciprocation of the head 2,there is one com' or immediately after,

plete revolution of the shaft 5.6;1it in turn operating through themechanism associated therewith to turn shaft 39 and the -seleoter plate45 attached thereto a part of a revolu-' tion, in the machineillustrated, one sixth of a revolution.

The support for the plate 32 at the upper end of rod 29, has anoutwardly extending arm 88' extending beyond the edge of thei plate 45and a vertical post- 89 issecnred td said arm 88. A member 90jis mountedon the post which passes through a slot 91 in. said member, lar 92 onthe post and being secured in any position to which adjusted by a nut 92threading on to the upper end of the post.

A vertically positioned, trough-shaped ring guide 93 is secured to theend of the member 90 and lies over the selector plate 45 (see Fig. 4).Ears 90 project from the member 90, to which bars 94 are connected, .3,rod 95* passing through the ears and ends of the bars 94 and having nuts95 on. the ends to securely bind the parts together. A verticalretaining bar 96 is connected to the ends of bars 94 and supportedthereby. The

ring castings 97 which are to be ground are placed in superimposedrelation between the guide 93.

The magnetic chuck is peridoicaliy ener the member resting on a 001-gized, oncev with each reciprocation of the head 2. A second housing 98alongside the housing 57 houses switch mechanism for making and breakingan electric circuit for the energizing of the chuck, a switch lever 99extending upwardly from; within the housing and being moved hack andforth when engaged by dogs 100 'adjustably mounted in the guide 87 onreciprocating head 2. The specific,- construction of the electriccircuit and the switch mechanism for controlling 1 same not-shown, 9.5this turned. its ring receiving openings feature is already old in theHeald machine.

With a construction of machine as described. the operation is asfollows: The ring holder or hopper is kept filled wholly or partly withrings which have been rough ground on their ends. and said rings arepositioned directly over the selec or plate 45 in a position such that,when the plate it: come under the rings and successively receive andtalze the lowermost ring: in the etacl: oi rings from the remaining:rings. After the 5 3 lector plate is moved a step or one sixth. of arevolution, it stops with an opening 4-6 directly under the stack ot'rings. The movement of the selector plate is positive and its stoppingat an exact predetermined point is positive. The rings received in theopenings 46 are carried over under plate 3'22 to the magnetic chuck (seeFig. 4) and the plate, during: its intervals of stopping has an openingit; directly over the chuck, so that a ring therein if: positionedventrally oi the chuck when the selector plate stops, The clutch is enerinal and the rin magneti -.ally attached. thereto "while the head 2moves forward to carry the grinding; wheel over the ring, it beingevident that the ring is rapidly rotated about its central vertical axisby reason of its attachmentto the chuck which is driven at high speed,and the grinding wheel is likewise rapidly rotated about its centralhorizontal axis. The upper end face of the. ring is accordingly groundtruiy with the passage of the grinding wheel for ward and backthereover. On the substantial completion of the rearward movement. ofthe head 2, the arm 85 of the hell-crank. lever is operated to make theselector plate turning mechanism effective, whereupon the plate isturned one sixth of a revolution to hrine' the next succeeding ring:into position for grinding, the ring which has been ground pas-:5: 1from the chuck, which inert durl!l i'-' a movements of the selectorplate, usrr the second under plate 31 and eventually dropping: from the.s lector plate when it has passed hy the. end ot' said under plate 31.it :mv hereceivcd in any suitable receptacle. v

The grinding ot the, rings proceeds continuously, one after the otherand all that is needed in the Way of labor is for the rings to he placedin the ring holder, this being; done by unskilled labor. The operationis rapid and large quantities of rings may be tiuish ground on one endin short time. It is t'il'WifltlS that the other end may he finishground in the same manner in a. different machine of like construction,or in the same machine by merely adjusting the ring selector plate andthe plates 31 and 32 a little higher, through operation of the settingwheel 17.

The machine is relatively simple, durable,

the ahaolute etoppr 53.1 has oer-n practica a stop. "This el minate:liltJYclH-fillb'i and it. ai operation oi the, machintn actice, the mano it C merit: I llton rings are hi l"? tities and nun he so made Iorder to produce and sell them conauurciaily, and the present, machine,3;; a ti step in eliminating wally s-l-ri finish grinding, and at thesame ti greater production per mach w w" sequent loweriinr oi overau Iaim h'urthernun'e, every riu our sun! and exactly the some, ations dueto the hon introduced in han skilled lalmr. All t to make the imentionone it"? zcc it.

I claim: 1. in combination, a '"t ried thereby and .m med vertical axis,a VGl'Liifitl rotatahly shaft, a thin circular plate upper end at theshaft? havii a. I equally spat?" openings ada r' rings cut t through, \lbrought in on over th tation of the shaft, a siren a tatahly mountedshaft, a. v-i at taehed to the upper end t;l'=ei'c enga onient with saidworl" which said worm secure riodieally rotating said hi n d shaft; a,single complete ria'v hlntion, and :neane fOLlZ driving; the tizistvertical shaft from the second vertical slfaft 2. In combination, asupport, a horizontally reciprmahle head mounted at the. upper end ofsupport, a rotatably mounted 125 grinding wheel mounted at the front ofthe head, an auxiliary support mounted on. the first support forvertical adjustment with respect thereto, means for vertically adjtist-1 ing the auxiliary support with respect; to

the first Support, a ehuek rotatahly mounted to turn about a vertn'al:lXiS on said auxiliary supportand positioned directly below thegrinding wheel, a vertieal shaft rotatahly mounted on the auxiliary support, a thln circular plate having ring reeelvmg openings thereinsecured at the upper eiuLet the shaft and paiising over said chuck toln'ingwaid openings in sueeession directly ofinthe renter ol'v theehnek, means to turn the shaft and attaehed plate periodically a part ofa revolution. and means to stop the plate 'with an opening therein Overthe (.llllt'li.

- 3. In combination, amain support, a

rinding'r wheel mounted. lherenn, an an lliary support adjnstahlyinounted (ill the main supportflneans-to adjust the auxiliary support.to dtll'erent positions, a rotataliiy mounted magnetic chin-k earned bythe auxiliary' support, adjarent the {grinding wheel ehnek inouuted toturn about a vertiealjaxis' lit-low the grinding wheel, a vertieallymounted shall, a en'eular plate with ring J't'tft'lViltQ openingstheretln'ougih attached to the upper end of the shaft and movable overthe e |tl(l\', a drive ehat't, mechanism interposed between the driveshaft and said vertieal shaft for .drivin the latter by the former,means normally holding the drive shaft and said lHtA'litllllHlllseparated, spring means ton etl'eeting eonneetion of the salne when saidholding means is released, nieans actuated by movement of said head forreleasing the lmltllllg means, and means for autonm-tieallydim-onneeting the drive shaft llfl it tfi t ld meehanisni after thenua-hanisin has nioyed the plate a predetermined distant-e.

5. ln t'titltliihulltlll with a grinding ma ehine having arhurk to holdrings to in: ground. a vertieaily n'munted shaft, nieanis' l'orperiodieallfy turning the .ahaI'tH-a partial revolntioin a-eircularplate lixed at the upper end of the shaft. having a' plurality of rin;reeeiving openings th'erethrongh moving over said ehuele a verticalpost, a memher at the upper end thereof located hori Zontall under theplate, an arm extending l'rom said tnelnhnr,.a post attaehed to said armand eatend vertira'lly above the metnher attaehed tn the pest andlocated amthe plate, and a vertical bar attached '60 plate. a vertieallypositioned trt i'ugh-shapetl r In testimony whereof] atlix my signature;I

CHARLES E. JOHNSON.

